So I have had my Fenix 5 for a few years, and when doing a long hike recently I noticed that after 5 hours of tracking it was down to 10% battery life. I know the backlight is a large driver of battery usage, so it is on 20% and is OFF during daylight hours anyway. Thoughts? I certainly had full ski days several years ago while tracking and did not remember getting a battery warning back then. How long do these internal batteries last?
Thanks!